﻿using System;
using System.Diagnostics;
using System.Globalization;
using System.Runtime.InteropServices;
using System.ComponentModel.Design;
using Microsoft.Win32;
using Microsoft.VisualStudio;
using Microsoft.VisualStudio.Shell.Interop;
using Microsoft.VisualStudio.OLE.Interop;
using Microsoft.VisualStudio.Shell;
using System.Windows.Forms;
using EnvDTE;

namespace LevelUp.CodeConverter
{
    /// <summary>
    /// This is the class that implements the package exposed by this assembly.
    ///
    /// The minimum requirement for a class to be considered a valid package for Visual Studio
    /// is to implement the IVsPackage interface and register itself with the shell.
    /// This package uses the helper classes defined inside the Managed Package Framework (MPF)
    /// to do it: it derives from the Package class that provides the implementation of the 
    /// IVsPackage interface and uses the registration attributes defined in the framework to 
    /// register itself and its components with the shell.
    /// </summary>
    // This attribute tells the PkgDef creation utility (CreatePkgDef.exe) that this class is
    // a package.
    [PackageRegistration(UseManagedResourcesOnly = true)]
    // This attribute is used to register the information needed to show this package
    // in the Help/About dialog of Visual Studio.
    [InstalledProductRegistration("#110", "#112", "1.0", IconResourceID = 400)]
    // This attribute is needed to let the shell know that this package exposes some menus.
    [ProvideMenuResource("Menus.ctmenu", 1)]
    [Guid(GuidList.guidCodeConverterPkgString)]
    public sealed class CodeConverterPackage : Package
    {
        /// <summary>
        /// Default constructor of the package.
        /// Inside this method you can place any initialization code that does not require 
        /// any Visual Studio service because at this point the package object is created but 
        /// not sited yet inside Visual Studio environment. The place to do all the other 
        /// initialization is the Initialize method.
        /// </summary>
        public CodeConverterPackage()
        {
            Debug.WriteLine(string.Format(CultureInfo.CurrentCulture, "Entering constructor for: {0}", this.ToString()));
        }



        /////////////////////////////////////////////////////////////////////////////
        // Overridden Package Implementation
        #region Package Members

        /// <summary>
        /// Initialization of the package; this method is called right after the package is sited, so this is the place
        /// where you can put all the initialization code that rely on services provided by VisualStudio.
        /// </summary>
        protected override void Initialize()
        {
            Debug.WriteLine (string.Format(CultureInfo.CurrentCulture, "Entering Initialize() of: {0}", this.ToString()));
            base.Initialize();

            // Add our command handlers for menu (commands must exist in the .vsct file)
            OleMenuCommandService mcs = GetService(typeof(IMenuCommandService)) as OleMenuCommandService;
            if ( null != mcs )
            {
                // Create the command for the menu item.
                CommandID menuCommandID = new CommandID(GuidList.guidCodeConverterCmdSet, (int)PkgCmdIDList.cmdidConvertCSharpCode);
                MenuCommand menuItem = new MenuCommand(MenuItemCallback, menuCommandID );
                mcs.AddCommand( menuItem );

				// Create the command for the menu item.
				menuCommandID = new CommandID(GuidList.guidCodeConverterCmdSet, (int)PkgCmdIDList.cmdidConvertVBCode);
				menuItem = new MenuCommand(MenuItemCallback2, menuCommandID);
				mcs.AddCommand(menuItem);

				// Create the command for the menu item.
				menuCommandID = new CommandID(GuidList.guidCodeConverterCmdSet, (int)PkgCmdIDList.cmdidCopyAndConvertCSharpCode);
				menuItem = new MenuCommand(MenuItemCallback3, menuCommandID);
				mcs.AddCommand(menuItem);

				// Create the command for the menu item.
				menuCommandID = new CommandID(GuidList.guidCodeConverterCmdSet, (int)PkgCmdIDList.cmdidCopyAndConvertVBCode);
				menuItem = new MenuCommand(MenuItemCallback4, menuCommandID);
				mcs.AddCommand(menuItem);
            }

			DeveloperfusionConverter.Default.ProgressChanged += Default_ProgressChanged;
        }
        #endregion

		public void PasteToEditor()
		{
			var text = Clipboard.GetText(TextDataFormat.Text);
			PasteToEditor(text);
		}

		public void PasteToEditor(string text)
		{
			if (text == null)
				return;

			var dte = (DTE)Package.GetGlobalService(typeof(DTE));
			var doc = (TextDocument)dte.ActiveDocument.Object("TextDocument");
			var start = doc.Selection.TopPoint.CreateEditPoint();

			doc.Selection.Insert(text);
		}


		private static string GetSelectionText()
		{
			var dte = (DTE)Package.GetGlobalService(typeof(DTE));
			var doc = (TextDocument)dte.ActiveDocument.Object("TextDocument");
			var start = doc.Selection.TopPoint.CreateEditPoint();

			return doc.Selection.Text;
		}

        /// <summary>
        /// This function is the callback used to execute a command when the a menu item is clicked.
        /// See the Initialize method to see how the menu item is associated to this function using
		/// the OleMenuCommandService service and the MenuCommand class.
		/// </summary>
		private void MenuItemCallback(object sender, EventArgs e)
        {
			var convertedCode = DeveloperfusionConverter.Default.ConvertToCSharpFromClipboard();
			PasteToEditor(convertedCode);
		}

		private void MenuItemCallback2(object sender, EventArgs e)
		{
			var convertedCode = DeveloperfusionConverter.Default.ConvertToVBFromClipboard();
			PasteToEditor(convertedCode);
		}

		private void MenuItemCallback3(object sender, EventArgs e)
		{
			var selectionText = GetSelectionText();
			DeveloperfusionConverter.Default.CopyAndConvertToCSharp(selectionText);
		}

		private void MenuItemCallback4(object sender, EventArgs e)
		{
			var selectionText = GetSelectionText();
			DeveloperfusionConverter.Default.CopyAndConvertToVB(selectionText);
		}


		private void Output(string text)
		{
			var pane = base.GetOutputPane(VSConstants.GUID_OutWindowDebugPane, "Debug");
			pane.Activate();
			pane.OutputString(text);
		}


		void Default_ProgressChanged(object sender, System.ComponentModel.ProgressChangedEventArgs e)
		{
			if (e.ProgressPercentage == 0 || e.ProgressPercentage == 100)
			{
				Output(string.Format("----- {0} -----{1}", e.UserState.ToString(), Environment.NewLine));
				return;
			}
			Output(e.UserState.ToString() + Environment.NewLine);
		}
    }
}
